Definitely no. You can't miraculously get 5A DC from an 2A DC source. You must have a transformer that supplies the necessary current to start with.salomonander said:Hey,
im really terrible at theory, so maybe someone can help me. I found this schematic for a 5v psu. The 78H05 is rated at 5A. Will the 2A 18v transformer deliver enough power for 5v 5A? Thanks
salomonander said:What would be the smarter option?
- use the circuit i found, but replace with a 6v 5A transformer and according rectifier
- use the circuit posted by PermO (thanks)
If they both work i tend towards the former option as i already bought the 78H05
Thanks a lot guys. Its much appreciated.
Newmarket said:Whichever way you go make sure to overdo the heatsinking. Are you familiar with thermal interface pads / grease etc ?
PermO said:Yup, always overdo the heatsink, just to be save.
Also, will it be feeding one device ? or multiple devices ?
If you worry about clean power don't just ty a bunch of devices together at one PSU output.
Create multiple output tabs using a resistor and a small cap.
Or... take a bunch of 7805's to create multiple regulated tabs.
This has been discussed so many times I feed funny saying this but I'll do it anyway ...Tubetec said:Ive definately seen issues arise in pedal boards where multiple switchmode psu's cause a bad interaction in the signal path . In the context of USB , computer supplies are notoriously dirty and untrustworthy .